new Rx antihistamine called Xyzal (ZEYE-zol)

You'll see ads for a new Rx antihistamine called Xyzal (ZEYE-zol).

Xyzal is levocetirizine...the levo isomer of Zyrtec.

It'll be promoted as faster and longer-lasting than other antihistamines...but this isn't significant for most patients.

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